public class CloseOutlineView implements IWorkbenchWindowActionDelegate {

@Override
public void run(IAction action) {
	
	IWorkbenchPage page = PlatformUI.getWorkbench()
			.getActiveWorkbenchWindow().getActivePage();
	IViewReference[] viewRefs = page.getViewReferences();
	if (viewRefs != null) {
		for (IViewReference ref : viewRefs) {
			if (IPageLayout.ID_OUTLINE.equals(ref.getId())) {
				page.hideView(ref);
			}
		}
	}
}

@Override
public void selectionChanged(IAction action, ISelection selection) {
	// TODO Auto-generated method stub

}

@Override
public void dispose() {
	// TODO Auto-generated method stub

}

@Override
public void init(IWorkbenchWindow window) {
	// TODO Auto-generated method stub

}

}

public class OpenOutlineView implements IWorkbenchWindowActionDelegate {

	@Override
	public void run(IAction action) {
		try {
			PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage().showView(IPageLayout.ID_OUTLINE);
		} catch (PartInitException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

	}

	@Override
	public void selectionChanged(IAction action, ISelection selection) {
		// TODO Auto-generated method stub

	}

	@Override
	public void dispose() {
		// TODO Auto-generated method stub

	}

	@Override
	public void init(IWorkbenchWindow window) {
		// TODO Auto-generated method stub

	}

}

	@Override
	public void initialize(IWorkbenchConfigurer configurer) {
		super.initialize(configurer);
		configurer.setSaveAndRestore(true);
	}